Lightweight organic-inorganic composite heat insulation foam material and preparation method thereof

Abstract

The invention discloses a lightweight organic-inorganic composite heat insulation foam material and a preparation method thereof. The composite heat insulation foam material is prepared through compounding 60-70 mass% of polyurethane foam, 10-20 mass% of nanometer zeolite-porous fiber composite aerogel, and the balance of modified meso-porous C-SiO2 nanospheres. The preparation method comprises the following steps: mixing above three substances, carrying out injection molding on the obtained mixture, carrying out swelling fixing on the injection molded mixture, demolding the obtained material, and post-curing the demolded material to obtain the organic-inorganic composite heat insulation foam material. The novel porous fiber composite aerogel is a polyurethane foam modifier, so the tensile strength of the polyurethane foam is improved, and the good heat insulation performance of the polyurethane foam material is ensured; and polyurethane is filled and modified with the modified meso-porous C-SiO2 nanospheres, so the heat insulation performance of the polyurethane foam is improved.

Description

technical field [0001] The invention relates to a light organic-inorganic composite thermal insulation foam material and a preparation method, which belongs to the technical field of composite functional materials and is suitable for the thermal insulation material of refrigerators. Background technique [0002] In recent years, the energy consumption of refrigerators accounts for more than 10% of the total energy consumption of households. For household refrigerators, the insulation of the box plays an important role. Early refrigerators usually used sponge, asbestos, etc. as insulation materials, but these materials did not have high heat insulation ability, which easily caused heat loss, resulting in high energy consumption of refrigerators, and because they were not waterproof, the insulation performance gradually lost during use. [0003] At present, the insulation material of domestic refrigerators is mainly rigid polyurethane foam material, and its thermal conductivit...

AI Technical Summary

Problems solved by technology

However, after adding modified materials, although the compressive strength of polyurethane foam is improved, the porosity of polyurethane is reduced at the same time, which makes the thermal insulation performance of polyurethane foam decrease.